package com.example.waimai.service.serviceimpl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.example.waimai.common.BaseContext;
import com.example.waimai.common.CustomEX;
import com.example.waimai.mapper.OrdersMapper;
import com.example.waimai.pojo.*;
import com.example.waimai.service.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

@Service
public class ServiceImplOrders extends ServiceImpl<OrdersMapper, Orders>implements ServiceOrders {
    @Autowired
    private ServiceShoppingCart serviceShoppingCart;
    @Autowired
    private ServiceAddressBook serviceAddressBook;
    @Autowired
    private ServiceUser serviceUser;
    @Autowired
    private ServiceOrderDetail serviceOrderDetail;
    @Transactional
    public void submit(Orders orders) {
        //得到用户id
        Long userId = BaseContext.getCurrentId();
        //查询购物车数据
        LambdaQueryWrapper<ShoppingCart> lqw=new LambdaQueryWrapper<>();
        lqw.eq(ShoppingCart::getUserId,userId);
        List<ShoppingCart> ShopCart = serviceShoppingCart.list(lqw);
        if(ShopCart==null||ShopCart.size()==0)
            throw new CustomEX("购物车为空");

          //得到用户信息
        User user = serviceUser.getById(userId);
          //得到地址信息
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = serviceAddressBook.getById(addressBookId);
        if(addressBook==null )
            throw new CustomEX("地址信息有误，不能下单");

        //插入一条数据
        long orderId = IdWorker.getId();//订单号
        AtomicInteger amount = new AtomicInteger(0);


        List<OrderDetail> orderDetails = ShopCart.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());

        //保存数据
        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        //向订单表插入数据，一条数据
        this.save(orders);

        serviceOrderDetail.saveBatch(orderDetails);
        serviceShoppingCart.remove(lqw);
    }
}
